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Poultry vaccines
Disease prevention by vaccination is an integral part of flock health management protocols. Active immunization using live vaccines is the current industry standard. Routinely used vaccines in chickens include MDV, NDV, IBV, and IBDV, and in turkeys NDV and HEV. Newer vaccines, including molecular recombinants in which genes of immunogenic proteins from infectious agents are inserted into a live viral vector, are also being examined for commercial use. Efforts are under way to enhance vaccine efficacy by the use of adjuvants, particularly cytokines. The vaccine delivery systems include in ovo injection, aerosol, spray, drinking water, eye drop, and wing web injection. The in ovo vaccination procedure is relatively new and at the present time it is used primarily to vaccinate broiler chickens against MDV. Birds respond to vaccines by developing humoral and cellular immune responses. There are two main types of vaccine available for poultry: live or killed.
Newcastle Disease (ND), a highly contagious viral pathology affecting poultry, remains a critical challenge for the commercial industry in Latin America. In this technical report, Eliana Icochea D’Arrigo, of the Avian Pathology Laboratory at the Faculty of Veterinary Medicine, UNMSM (Universidad Nacional Mayor de San Marcos) in Lima, Peru, explores the virus's impact and the necessary measures to mitigate its effects. The study, "Newcastle Disease: Understanding the virus better to...
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I. INTRODUCTION Field success of mass ILT vaccination in young meat chickens is often accompanied by reports of vaccine reactions, often rolling through the flock for some time, and even apparent vaccination failure with wild strain outbreaks in vaccinated flocks. This is in spite of laboratory challenge studies often describing good protection of vaccines against an artificial challenge with the field outbreak strain (Arzey and Arzey, 1993). Laboratory studies (Rodrigues-Avila...
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January 25, 2027
United States - Georgia - Atlanta
1. Introduction Coccidiosis is the first and most economically significant parasitic disease afflicting chicken welfare and, consequently, the world’s poultry industry [1]. E. tenella is the causal agent of cecal coccidiosis, and this species is regularly isolated from broiler farms worldwide [2]. Chemoprophylaxis and live wild-type/attenuated coccidia vaccines are currently used as preventative methods [3,4]. Protective immunity can be achieved by infecting chickens...
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Salmonella infections cause enteric diseases in humans and animals, and poultry production is commonly associated with contamination by this foodborne pathogen. S. Enteritidis (SE) and S. Typhimurium (ST), as well as other serotypes such as S. Heidelberg (SH) and S. Infantis (SI), are highly prevalent. This study evaluated the protection conferred by a live SE vaccine (auxotrophic for the amino acids adenine and histidine) in laying hens exposed to field strains of SH or SI....
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Eric Shepherd (Zoetis) talks about the application of an immune-complex IBD vaccine and its benefits, during this Engormix interview at IPPE 2026 in Atlanta. ...
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Vijay Durairaj (Huvepharma) shares insights into Turkey Coccidiosis and the data obtained from his research, in this Engormix interview at IPPE 2026 in Atlanta. ...
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Kalen Cookson (Zoetis) comments on sample collection, FTA cards, CT values, and identifying possible issues in the hatchery, in this Engormix interview at IPPE 2026 in Atlanta. ...
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1. Introduction The ongoing pandemic of a highly pathogenic avian influenza virus (HPAIV) of subtype H5N1 (goose/Guangdong lineage [gs/GD]), clade 2.3.4.4b, is posing an unprecedented threat, impacting both industrial and small-scale poultry operations [1,2]. Similarly, HPAIV infections in wild birds, particularly those leading to mass mortalities among colony-breeding species, are exerting significant pressure on avian biodiversity [3,4]. The recent increase in spillover...
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Brian Jordan (University of Georgia) explains how False Layer Syndrome affects poultry and what can be done to prevent it, in this Engormix interview during IPPE 2024 in Atlanta, USA....
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Introduction Avian metapneumovirus (aMPV) is a virus that causes respiratory and reproductive distress in chickens and turkeys. This condition leads to impaired performance and increased mortality, particularly when accompanied by secondary infections. While the virus has traditionally been downplayed in broilers, recent field investigations have highlighted the direct implication of aMPV in respiratory problems (Al-Hasan et al., 2022; Nguyen et al., 2021; Franzo et al., 2017;...
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Author details: 1 Federal University of Santa Maria (UFSM), Veterinary Medicine Graduate Program, Master in Animal Health and Reproduction, Santa Maria, Brazil; 2 Federal University of Santa Maria (UFSM), Department of Animal Science, Santa Maria, RS 97105-900, Brazil; 3 Federal University of Santa Maria (UFSM), Center for Rural Sciences, Department of Preventive Veterinary Medicine, Laboratory of Diagnosis of Avian Pathologies, Santa Maria, Brazil; 4 Santa Catarina State...
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Dr. Prakash Reddy from Ventry Biologicals outlines the major respiratory threats in Indian poultry, including emerging ND genotypes and multiple IB variants. ...
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Deepak Khosla from the Venkys Group highlights steady growth in India’s poultry sector alongside rising challenges: mycotoxins, biosecurity gaps, and weakened immune responses. He stresses strict vaccination programs, strong biosecurity after global avian influenza events, and better water and shed management. With climate-driven grain contamination increasing, producers must adopt precise solutions to protect flock performance. ...
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Respected Srs, greetings. I have high water PH in my farm and I used citric acid as acidifier to reduce the PH .Has the acidified water by citric acid any effect on live vaccine that sometimes I used . ...
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I. INTRODUCTION The basis for effective control of Salmonella infections in poultry production is good farm management and hygienic practices as well as testing and elimination of positive flocks in some countries. While many different measures have been recommended in meat chicken farms, vaccination with live-attenuated vaccines is likely to have a central role in the reduction of Salmonella in commercial operations by increasing the passive immunity of birds and...
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I would be grateful if somebody could explain me: A flock was vaccinated with Ma 5 and clone 30. Sample collected 3 weeks post vaccination. Using Elisa the response to IB was low although within the expected range. Elisa was conducted for Mg. Ms., ART. In addition to AI, the titer was normal. PCR was conducted only Ms was detected at Ct 29. I would like to ask why the mean titer of Ms was low. ...
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1. Introduction Avian Reovirus (ARV) poses a significant threat to the poultry industry, infecting both domestic and wild avian species. ARV infections manifest in a diverse range of clinical signs, encompassing tenosynovitis/arthritis, immunosuppression, enteric disease, hepatitis, myocarditis, malabsorption, and runting–stunting syndrome [1,2]. While domestic avian species are generally susceptible to ARV, meat-type chickens and turkeys [3,4] are, however, more susceptible to...
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Dear my colleagues I would be grateful if somebody tell me-
1- the advantage of mycoplasma gallisepticum ts-11 vaccine
2- its limitations
3-duration of immunity and when to count it from start of injection , onset of immunity or when the vaccine reach its peak
regard...
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FIGAP 2026: The Scientific And Technological Exhibition Of The Livestock Industry
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Dr. Ioannis Mavromatis, MEA Technical Sales Consultant for Calier, explores how Salmonella threatens poultry producers in the Middle East and North Africa. He discusses its impact on human health, farm contamination, and the role of vaccination, biosecurity, and farm management in controlling outbreaks....
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1. Introduction Salmonella Enteritidis (SE) is one of the most prevalent serovars involved in the contamination of chicken products that cause human infection via the consumption of inadequately cooked chicken meat and eggs [1–4]. Because adult chickens with non-typhoidal Salmonella infection do not exhibit signs of illness, they can remain carriers, releasing the bacteria into the environment through their feces [3]. The poultry industry aims to decrease Salmonella...
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